Antifreeze device for water systems



Aug. 25, 1931. s, WLONE 1,820,473

ANTIFREEZE DEVICE FOR WATER SYSTEMS Filed March 15, 1930 i i A r v with a circular outwardly extend ng flange l atented Aug. 25, 1931 [mm i SAMU'EL MILONE, or CAMDEN; new JEB-SEY,' essieivon, 'BY MESNE' ASSIGNMENTS, To

'roRA'rIoN oFNEw JERSEY EARLE eiv'rr-rnnnznvvenvn coii-ronerronyor C MD N, ,NEIWZJERSEY, A con- 'ANTI'FREEZE' Davies] FOR whens SYSTEMS Application filedMarch 13, 1930. Serial No. 435,559.

This invention relates to a ,device for preventingthe freezing of water systems, particularly the cooling ystems of automobiles,

and comprises a thermostatically operated valve adapted to drain the system when the water therein reachesor closely approaches the freezing point. j a P Referring to the drawings:

Fig. 1 is a sectional, ele ation of the device forming the subject of my, invention;

Fig. line 2-2, Fig. 1; and

Fig. 3 is a sectional elevation taken on the line 3+3, Fig. 1. v

The device compr ses a casing 1 composed] of atop cup-shaped section 2 and a bottom cup-shaped section 3, with a horizontal ring or plate 4' interposed between thetwo sectiOIlS. I ,7

Each of the sections. 2 and=. 3"is provided 5, through; which and the said plate t rivets 6 extend, to securethe whole together as a unit and to prevent tampering with the op:

erating elements, within the casingl, afterT these elements have been properly adjusted to function when-the proper draining tem p'erature is reached;

, The top sectlon 2 r its upper end which is'tapped and threaded as at 8 to receive anipple or;otherthreaded element, by means of which thedevice is adapted to be operatively connected to the bottom of the radiator or; other equally low point in thewater system to be controlled.- Y

' The lower section 3 is provided w th a depending boss 9-in which, andthelower part of the section 3,-is located a 'body of metal v 10 which "may beaformed by molding the body of metal directly in thelower section 3,,or by previously forming thei bod'y of metal into the desired shape and thereafter inserting.

and suitably securing it in placewithin the 'The plate -or ring-dis open at its lcenterand is a sectional plan view taken on-the has aboss 7 formed on opening formed in a bossil8 on the lug 15.

1n the'l'ug ltand the other endof which s I J threaded and passes through a threaded Spirally wound around the bar 16 is a thermosensitive element 20 which comprises twostrips of metal 21 and 22 having different coefiicients of xpansion.

These two strips of metal are suitably secured together by Sweating, soldering or other well known means, to form the thermosensitive unit 20. The thermosensitive unit20 has one end' closely wound about andflattened'against the fiat sides of the hexagonal bar 16, as illustrated at 23, to secure this end of the said uni c 20 rigidly to said bar. The cylindrical body portion of said unit 20 comprises a j series of convolutions' 24 of substantially equal. diameters spaced longitudinally of the bar 16,; terminating at the free end in an arm or lever 25, which rests on and extends, laterally from the supporting bar 16.

The outer end of the arm 25 of the thermosensitive unit 20 projects through aslot 26 fOIIIIBd'lIl the upper end of a tongue 27, the

lower end of which is'suitablysecuredto the ball valve 1 3. V r Adjustment of the mechanism, so that the valve 13 will be unseated when a temperature 1 closelyv approaching the freezing point is reached,is made by turning the bar16so the bar '16 and the flatteningof the boss against the flat sides ofthe bar "16 prevent V r that the arm 25 may be set at the proper 7 angle relative to the bar 16 to co-operate withthe tongue 27 of the valve 13.

turning thereof after adjustment has been made.

In operation the valve 13, resting on the seat 12, normally closes the drain port 11 and retains the Water in the system. As the temperature of the Water in the system approaches closely to the freezing point, that is, for example, Within one-half of one degree above the freezing point, or 32 F. the thermo-s'ensitive element Will operate to turn the arm thereof in a direction to raise the valve 13 from its seat 12, thereby permitting the Water to be drained from the Water system through the drain port 11.

Turning of the arm 25 is effected by the diiferent expansion coefficient of the respective metallic strips 21 and 22 of Which the thermosensitive element 20 is composed, contracting in different proportions, the outer strip 21 contracting more rapidly than the inner strip tending to unwind or straighten the element 20 and this action causing the arm 25 to fulcrum about the bar 16 and thereby unseat the valve 13. Obviously an increase in the temperature will tend to turn the arm 25 in the opposite direction and thereby press the valve 13 more tightly against the seat 12.

I claim:

1. In an anti-freeze device for Water systems, the combination of a drain valve for connection in said system, and a thermostatic control for said valve, said thermostatic control comprising a supporting bar, a bimetallic stri formed into a substantially cylindrical orm around said bar, one end of the strip being secured to the bar and the opposite end of the coiled strip terminating in an arm fulcrumed on said bar and operatively connected at its free end to said valve.

2. In an anti-freeze device for Water systems, the combination of a drain valve for connection in said system, and a thermostatic control for said valve, said thermostatic control comprising a supporting bar, a bimetallic strip formed into a substantially cylindrical form consisting of a plurality'of convolutions of substantially equal diameter coiled around said bar and spaced longitudinally thereof, one end of the strip being secured to the bar and the opposite end of the coiled strip terminating in an arm fulcrumed on said bar and operatively connected at its free end to said valve.

3. In an anti-freeze device for Water systems, the combination of a casing having an inlet adapted to be connected to a Water system and an outlet adapted to permit the draining of said system through said casing, a valve Within the casing and normally closing said outlet, a bar supported Within said casing, and a thermosensitive control element Within the casing and operatively connected to said valve, said element comprising a bimetallic strip having one end secured to said nating in an arm extending laterally from and adapted to fulcrum about said bar, said arm being operatively connected to said valve.

4. In an anti-freeze device for Water systems, the combination of a casing having an inlet adapted to be connected to a Water sys tem and an outlet adapted to permit thev draining of said system through said casing, a valve Within the casing and normally clos-- ing said outlet, a thermosensitive control element Within the casing and operatively connected to said valve, means located en-- tirely Within the casing for adjusting the said thermosensitive control element, and means for permanently sealing the casing after the adjustment of said element has been made.

5. In an anti-freeze device for Water systems, the combination of a casing having an inlet adapted to be connected to a Water system and an outlet adapted to permit the draining of said system through said casing, a valve Within the casing and normally closing said outlet, a bar supported Within said casing, a thermosensitive control element Within the casing and operatively connected to said valve, said element comprising a bimetallic strip having one end secured to said bar and the remainder of the strip formed into a cylindrical body composed of a plurality of convolutions of substantially equal diameters spaced longitudinally of'said bar and surrounding said bar, said strip terminating in an arm extending laterally from and adapted to fulcrum about said bar, said arm being operatively connected to said valve, means located entirely Within said casing for turning said bar to adjust said arm relative to said valve, and means for permanently sealing said casing after said adjustment has been made. 7

6. In an anti-freeze device for Water systems, the combination of a casing having an inlet adapted to be connected to a Water system and an outlet adapted to permit the draining of said system through said casing, a valve Within the casing and normally closing said outlet, a bar supported Within said casing, a thermosensitive control element Within the casing and operatively connected to said valve, said element comprising a bimetallic strip having one end secured to said bar and the remainder of the strip formed into a cylindrical body composed of a plurality of convolutions of substantially equal diameters spaced longitudinally of said bar and surrounding said. bar, said strip terminating in an arm extending laterally from and adapted to fulcrum about said bar, said Oil ' turning said bar to adjust said arm relative I to said valve, means for permanently secuiy arm being operatively connected to said valve,

means located entirely within said casing for ing said bar in its adjusted position, and

means for permanently sealing said casing after said adjustment has been made.

7. In an anti-freeze device for water systerns, the combination of a casing having an inlet adapted to be connected to a' water system and an outlet adapted to permit the draining of said system through said casing, a valve within the casing and normally closing said outlet, a thermosensitive control element within the casing and operatively connected to said valve, means located entirely within the casing for adjusting the said thermosensitive control element, said casing com prising a pair of cup-shaped sections with their open sides adjacent each other, a plate interposed between the said sections of the I casing and adapted to support the said operating elements of the device, and means for permanently securing the said sections of the casing together adapted to be applied after the said adjustment has been made;

8. In an anti-freeze device for water systems, the combination of a casing having an inlet adapted to be connected to a water system and an outlet adapted to permit the draining of said system through said casing, a valve within the casing and normally closing said outlet, a thermosensitive control element within the casing and operatively coneratively connected to said valve, means for securingsaid bar against movement with respect to said plate, and rivets passing through said-flanges and said plateto permanently secure the casing sections together.

10. In an anti-freeze device for water systems, the combination of a casing comprising a pairof cup-shaped sections, a flange extending around each section adjacent the open side thereof, a plate interposed between said fianges,,said sections and said plate having openings permitting the passage of water through the casing, a valve controlling the passage of said water through the opening I in one of said sections, lugs on said plate, a fiatsided bar supported by said lugs and having threads, formed on one endwhichcooperate with threads formed in one of the lugs, a thermosensitive element comprising a bimetallic strip formed in a series of con- ,vo-lutions around and spaced longitudinally of said bar, one end of said strip being rigidly secured to said bar and the opposite end of said strip terminating in an arm extending laterally from said bar and operatively connected to said valve, a boss formed on one 7 of said lugs and having its-wall depressed against a flat side of said bar for preventing rotation of said bar, and rivets passing through said flanges and said plate to permanently secure the casing sections together.

SAMUEL MILONE,

nected to said valve, means located entirely I open side of each section, a plate interposed betwen'the flanges of said sections of the easing and adapted to support the said operatin g elements of the device, and rivets passing through said flanges and said plate, adapted to be set after the said adjustment has been made to permanently secure the elements of the casing together. 7

9. In an anti-freeze device for watersystems, the combination of a caslng comprlsing a pair of cup-shaped sections, a flange extending around each section adjacent the open side thereof, a plate interposed between said flanges, said'sections and saidplate having openings permitting the passage of water through the casing, a valve controlling the passage of said water through the opening in one of said sections, lugs on said plate, a bar supported by said lugs, a thermosensitive element comprising a bimetallic strip formed in a series of convolutions around and spaced. longitudinally of said bar, one end of said strip being rigidly secured to said bar and the opposite end of said strip terminating in an arm extending laterally from said bar and op- 

